主权项 |
1. A manganese oxide thin film formed on a plane of a substrate, comprising:
a substrate of plane orientation (210); and a manganese oxide thin film formed on a plane of the substrate and having a composition represented by composition formula RMnO3, where R is at least one trivalent rare earth element selected from lanthanoids, wherein an atomic layer containing an element R and not containing Mn, and an atomic layer containing Mn and not containing the element R are alternately stacked along a stacking direction perpendicular to the plane of the substrate, the manganese oxide thin film has two nonequivalent crystal axes along an in-plane direction of the plane of the substrate and has a polar surface containing an electric field, and cations R and Mn are translocated relative to O to generate polarization so as to lean toward the stacking direction. |